These earmuffs can be worn over the head, behind the head or under the
chin, letting you choose the position that is most comfortable. Patented Air Flow Control ™ technology delivers optimal attenuation, and the inner ventilated headband reduces pressure on the head and is more breathable in warm environments. Can be comfortably worn with other PPE, including hard hats, faceshields, respirators and welding shields. Dielectric construction is safe for use around electrical hazards. Meets ANSI S3.19-1974. Imported. Specify NRR: 24-25 NRR model, 25-27 NRR model, 27-29 NRR model from the drop box above.